github.com/minio/minio-go/v6@v6.0.57/api-get-policy.go (about)

     1  /*
     2   * MinIO Go Library for Amazon S3 Compatible Cloud Storage
     3   * Copyright 2015-2017 MinIO, Inc.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package minio
    19  
    20  import (
    21  	"context"
    22  	"io/ioutil"
    23  	"net/http"
    24  	"net/url"
    25  
    26  	"github.com/minio/minio-go/v6/pkg/s3utils"
    27  )
    28  
    29  // GetBucketPolicy - get bucket policy at a given path.
    30  func (c Client) GetBucketPolicy(bucketName string) (string, error) {
    31  	// Input validation.
    32  	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
    33  		return "", err
    34  	}
    35  	bucketPolicy, err := c.getBucketPolicy(bucketName)
    36  	if err != nil {
    37  		errResponse := ToErrorResponse(err)
    38  		if errResponse.Code == "NoSuchBucketPolicy" {
    39  			return "", nil
    40  		}
    41  		return "", err
    42  	}
    43  	return bucketPolicy, nil
    44  }
    45  
    46  // Request server for current bucket policy.
    47  func (c Client) getBucketPolicy(bucketName string) (string, error) {
    48  	// Get resources properly escaped and lined up before
    49  	// using them in http request.
    50  	urlValues := make(url.Values)
    51  	urlValues.Set("policy", "")
    52  
    53  	// Execute GET on bucket to list objects.
    54  	resp, err := c.executeMethod(context.Background(), "GET", requestMetadata{
    55  		bucketName:       bucketName,
    56  		queryValues:      urlValues,
    57  		contentSHA256Hex: emptySHA256Hex,
    58  	})
    59  
    60  	defer closeResponse(resp)
    61  	if err != nil {
    62  		return "", err
    63  	}
    64  
    65  	if resp != nil {
    66  		if resp.StatusCode != http.StatusOK {
    67  			return "", httpRespToErrorResponse(resp, bucketName, "")
    68  		}
    69  	}
    70  
    71  	bucketPolicyBuf, err := ioutil.ReadAll(resp.Body)
    72  	if err != nil {
    73  		return "", err
    74  	}
    75  
    76  	policy := string(bucketPolicyBuf)
    77  	return policy, err
    78  }